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Old September 10, 2009, 11:15 AM
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Default P55 v x58 Questions

I'll be looking to get a new board soon and both of these are very appealing. Obviously cost/performance is what is concerning me. My plan with this new rig is to grab 1 card for now (260/275) and whenever the 300 series comes out, upgrade to 2/3 way sli. With that being said, I've read numerous things about P55 running in 8x/8x/8x. I can't seem to find an answer, does the EVGA P55 run more than one 16x slot? Or do any other boards out there run 2-3 16x slots? I thought that was what the NF200 chip does, but I'm not 100% sure on it. Anyways, I still have a few weeks to decide but I love doing my shopping in advance.
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Old September 10, 2009, 11:29 AM
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the x8 will most likely bottleneck the new cards if your running more then 1. So I would recommend an x58 for that.

If you plan to just get 1 huge card like a 5870x2 the P55 is the way to go.
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Old September 10, 2009, 03:23 PM
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after reading the review on anandtech about the new gen of ATI cards, my guess is that x16 may even be limited, let alone x8

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Old September 10, 2009, 04:03 PM
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If even the most optimistic of the rumours for the upcoming cards are true, there's no way PCI-E 2.0 x16 is going to be a bottleneck. I have yet to see conclusive evidence that current dual-GPU cards bottleneck with an x8 connection.

Regardless, if you honestly think you'll want Tri-SLI, that pretty much rules out the P55. SLI+PhysX will be okay, as long as the motherboard's got the room for it, but still not a very elegant one.
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Old September 10, 2009, 04:37 PM
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P55 (lga 1156) and X58 (lga1366) have different sockets. P55 is for the new i7 8 series and the i5 series while the X58 is for the i7 9 series processors.
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Old September 10, 2009, 06:16 PM
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There are no dual 16x P55 mother boards and none that support Tri SLI so far that I know of. Although the EVGA P55 classified is in the works but if you are spending that kind of money might as well just get a X58 board.

P55 will be fine with SLI but not Tri SLI.

Remember that PCIe 2.0 is double the bandwidth of PCIe 1.0 so that means that you have 32 PCIe lanes in 2.0 compared to 1.0. 8x PCIe 2.0 is like 16x PCIe 1.0 and I still don't think that PCIe 1.0 is fully saturated.
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Old September 10, 2009, 09:31 PM
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There are no dual 16x P55 mother boards and none that support Tri SLI so far that I know of. Although the EVGA P55 classified is in the works but if you are spending that kind of money might as well just get a X58 board.

P55 will be fine with SLI but not Tri SLI.

Remember that PCIe 2.0 is double the bandwidth of PCIe 1.0 so that means that you have 32 PCIe lanes in 2.0 compared to 1.0. 8x PCIe 2.0 is like 16x PCIe 1.0 and I still don't think that PCIe 1.0 is fully saturated.
Yeah I was curious about the Classified board. There's also the ftw 200, a bit cheaper and a bit more appealing.
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Old September 11, 2009, 07:39 AM
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ftw 200 will support triple SLI (x8/x8/x8) but don't count on it supporting the next gen too well.. I'm thinking its gonna exceed the x8 bus on the top end single gpu solution.. let alone dual gpu solution

if you're going to dump the kind of money it takes for triple SLI, don't cheap out on $25-$50 by going with a P55 mobo instead of an x58
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Old September 11, 2009, 08:14 AM
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Alright, I'd love to save money but :( Thanks for the help!
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